Microwave egg cooker base



FIG. 1 is a top, front perspective view of a microwave egg cooker base showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front or rear elevational view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a microwave egg cooker base, as shown and described. 